/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.web.reactive.result.method.annotation;

import reactor.core.publisher.Mono;

import org.springframework.core.MethodParameter;
import org.springframework.ui.Model;
import org.springframework.web.reactive.result.method.BindingContext;
import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
import org.springframework.web.server.ServerWebExchange;

/**
 * Resolver for the {@link Model} controller method argument.
 *
 * @author Rossen Stoyanchev
 * @since 5.0
 */
public class ModelArgumentResolver implements HandlerMethodArgumentResolver {


	@Override
	public boolean supportsParameter(MethodParameter parameter) {
		return Model.class.isAssignableFrom(parameter.getParameterType());
	}

	@Override
	public Mono<Object> resolveArgument(MethodParameter parameter, BindingContext bindingContext,
			ServerWebExchange exchange) {

		return Mono.just(bindingContext.getModel());
	}

}
